Tback fob eo ad ways



l. C. SCHRICKER.

TRACK FOR ROADWAYS.

APPLlcAlou man JULY 2a. |919.

E. ,3 18,332, Patented Oct. 7,1919.

Aproved track.

'narra sraA carica.

TRACK FOB ROADWAYS.

Specification of Letters Batent.

Patented Oct. '7, 1919.

`App1icaton filed July 23, 1919. Serial No. 312,703.

To all whom t may concern:

Be it known that I, JOHN C. SGHRICKER, a citizen of the United States,and a resident of Davenport, in the countyv of Scott and State of Iowa,have invented certain new andv useful Improvements in lTracks forRoadways; and I ldo hereby declare that the following is a full, clear,and exact description thereof, reference being had to the accompanyingdrawings, and to the letters of reference marked thereon, which form apart of this specification.

This invention relates to improvements in tracks for roadways and thelike and consists of the matters hereinafter described and moreparticularly pointed out in the appended claims.

The object of the invention is to provide an eflicient and durablevtrack for the traffic lines of roadways upon which may run the tread ofvehicle wheels. l

This vobject together with the various advantages of the invention willbe made more apparent as I proceed with my specification.

In the drawings Figure l illustrates a cross section through a roadwayto which my improved track has been applied.

Fig. 2 illustrates a longitudinal section through one of the tracks, theplane of the sectionbeing indicated by the line 2 2 of Fig. 1.

Fig. 3 'illustrates av transverse section through one of the tracks, theplane ofthe section being indicated byV the .line 3-3 of F ig. 2.

Fig. 4; illustrates a perspective view of a block forming a sectionalpart of the im- Referring now in detail to that embodi-y ment of theinvention, illustrated' in the accompanying drawings :-`5 indicates as awhole, an arched roadway which may be paved or unpaved, and 6 indicatesmy improved tracks embedded therein. The said itracks extendlongitudinally of the roadway and are spaced apart a distance equal tothe wheel gage of standard vehicles.

Each track 6 is made up of a plurality of sections in the form ofelongated blocks 7 placed in overlapping end to end arrangement, theends of said blocks having interlocking parts to prevent lateraldisplacement. In Fig. a' I have shown a perspective view of one of saidblocks which I preferably make of reinforced concrete or other suitablematerial. As all the blocks are similar in shape, a detailed descriptionof one willsuiiice.

They block 7 is preferably rectangular in form, of a length greater thanits width and of a thickness less than said width. At one end, on thetop side of said block, is an extension 8, and at the other end of thebottomv side of said block is an extension 9 which is adapted to beoverlapped by the extension 8, of an adjacent abutting block 7. In thetop surface of the bottom extension 9 is provided a longitudinallyarranged groove l0, in which a rib 11 on the overlapping top extensionof the adjacent block 7 is adapted to engage. By this construction, thatpart of the extension 9 and S respectively, defining the side walls ofthe groove l() and rib 1l, provide co-acting shoulders which lock thelapping extensions together against lateral movement, so that the blocksin the track will always be in alinement.

Preferably, I provide in the top surface of each block, a longitudinalconcavity or shallow groove l2, in which vehicle wheels will travel andbe guided against ruiming olftlie track. Also, for the purpose ofdrainage, so as to prevent the accumulation of water in the grooves 12,.I provide at the middle and on each side of the top of each block,transverse grooves 13 which open into said grooves l2.

To insure strength against breakage, I reinforce each block with metalinthe form of a woven or expanded metal mat 14, which, as shown in Fig.2, extends from the middle of the top extension 8, obliquely downwardthrough the'body of the block and into the middle of the bottomextension 9. This mat which is entirely embedded in the block,v isinvisible upon observation of an individual block and provides a maximumof tensile strength for each block, so that it withstands all stressesimposed upon. it when in use for its intended purpose.

In laying the blocks end to end, to form a track, I preferably apply tothe engaging surfaces of the overlapping extensions, a joint filler of apitchy on tarry mixture, as shown at 15 in Fig. 2 and Fig. 3, whichholds the blocks together in an end to end position with respect to eachother, and allows for the expansion and contraction of the lieaval ofthe blocks due to atmospheric changes. Y

A track made up of my improved blockS, possesses many advantages. It may'beuse in connection with either macadamizped or gravel roads, andis'pr'actical and ecnmical for its intended purpose.vr It, eliminatesruts and chug holes that provide undue pounding and L'vibration wear invehicles, and as the blocks making upthe track are easy I to lay yinplace, the oost of construction is but a small part of that of afully-paved` each block having endvextensions, the end extension on oneblock belngadapted to overlap therend extension on the abutting block,said extensions having interengaging parts adapted to lock said blocksagainst lateral movementbut permittingof an endwise expansive andcontractile movement.

2. A trackfora roadway comprising, a plurality of blocks arranged end toend, each block having end extensions, the4 end extension on oneblockbeing` adapted to overlap the end extension onthe abutting block, saidvend `lextensions having interengaging parts adapted to locksaidblocksagainst lateral movement, but 4permitting of an endwise expansive andcontractile movement of said blocks, each block. having a longitudinalgroove in its top surface which forms a continuation of a like Agroovein the abutting` blocks.

8. A Vtrack fora roadway comprising, a

plurality of block s^ arrangedend to end, each block havingvendextensions, the end extension on onev block` being adapted to overlapthe end extension on the, abutting block, said end extensions havinginter- Gopis ofwtlii's patent inaykbeioltaine'fr engaging liffarts'adapted to lock said yblocks against lateralmovement, bu-t permittingof ian* endvvisel expansive' 'and contractile movement of Asaid blocks,each block having a longitudinal groove in its top surface which 'formsav continuation of like grooves in the blocks, and having -tia's've'segrooves atA their `,middle which open into said longitudinal grooves.

l. A track fora roadway,comprisi1g,aplurality .1015 'blocks' arranged.end to end, each block having; end-extensions, the-fend extension ofone block bei-ng, adapted-to overlap the end extensionon the abuttingblock,l l 'said end ,extensions havingA interengagingy .parts adapted tolock s aidfblocks against lateral ,movemerrav and reinforcing meansembedded in said fblockandjextending from one-tothe otherextensionthereof. Y n

5. A'b-lock forthje purpose describedQ-cQm-` prising a rectangularbodyhavinga-shaliow groove in its top surface and"Y a `.topi extensionvatone 'end and, a bottom i, extensiony at its other end, the said topextensionbeing adapted to overlap the bottom extension fof an abuttingblock, one of Asaid extensions having aA groove vand the other of saidextensions' having. rib, 'the rib? J0.11 @iwi extension being adapted toengagefin the groove in the other extension'of an abutting block.

`6. A block for the 7purpose described, comprising `a rectangular bodyhaving-a shallow groove in itstopsurface, land a topy extension at oneend and a bottom extensionjat its other end, the top extension' having aribvon its *bottom surface, which is adapted. to :en-

gage in a groove in the top surface'gof a.v bottom extensiongwhenapluralfity jof said blocks are arrang-lied to endin abut'ting relation,v and ajreinforcing'metallic 'mat in said block, extending obliquelythroughfsaid body. and into said end extensions yat their middle.

In 'esfmeyxt1ia @ein a@ te?eg-'QingY as my invention, I affix mysignature in thek presence :of two, witnesses, this 18th day 'of July,A. D. 1919.

Vit/nssesz., i y i CARL LAMBAC'H", VERA LISCHER.

